package/qt5/qt5base: fix imx6 eglfs support with imx-gpu-viv

Last commit fixed eglfs_kms support for i.MX8 platforms that required to
declare imx-gpu-viv as the gbm provider.
However, this broke the eglfs "fbdev" imx6 support as gbm isn't provided
in this case. So limit the gbm option to imx-gpu-viv when wayland
backend is used only.

Fixes: 82fb51d3b5 ("package/qt5/qt5base: allow to use imx-gpu-viv as GBM
provider")

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/qt5/qt5base/qt5base.mk

@@ -79,7 +79,7 @@ QT5BASE_DEPENDENCIES += gcnano-binaries
 else ifeq ($(BR2_PACKAGE_TI_SGX_LIBGBM),y)
 QT5BASE_CONFIGURE_OPTS += -gbm
 QT5BASE_DEPENDENCIES += ti-sgx-libgbm
-else ifeq ($(BR2_PACKAGE_IMX_GPU_VIV),y)
+else ifeq ($(BR2_PACKAGE_IMX_GPU_VIV_OUTPUT_WL),y)
 QT5BASE_CONFIGURE_OPTS += -gbm
 QT5BASE_DEPENDENCIES += imx-gpu-viv
 else